Improved apparatus for desulphurizing ores



CROSBY & HELM.

Roasting Ores.

Patented Aug. 21, 1866.

Inventor: womln Mot Witnesses:

WnM HM m owemw l AM- PHOTO-LITHO.CO. N.Y. (OSBORNE'S PROCESS.)

rates llama ATENT @FFICE.

FRANCIS W. CROSBY AND WOQDHULL HELM, OF NEW YORK, N. Y.

lMPROVED APPARATUS FOR DESULPHU RIZING ORES.

Specificationformingpart of Letters Patent No. 57,293, dated August -21,1866.

To all whom it may concern:

Be it known that we, F. W. CROSBY and VVOODHULL HELM, of the city,county, and State of New York, have invented a new and ImprovedApparatus for the Desulphurization of Pulverized Ores, and for otherpurposes; and we do hereby declare the following to be a full, clear,and exact description of our inveir tion, reference being had to theaccompanying drawings, forming a part of this specification, in which-Figure 1 is a perspective view of our improved apparatus; Fig. 2, alongitudinal sec.- tion thereof; Fig. 3, a detached plan view of 1 twoof the conveying tables or shelves; and Fig. 4., an enlarged side viewof one of said tables detached.

Similar letters indicate like parts in each of the drawings.

The nature of our invention consists in the combination of a series ofsliding tables or shelves driven by suitable machinery with an inclinedplane, forming the bottom of a flue, through which thedesulphurizing-gases are made to flow in a strong current to convey thepulverized ore at any desired speed in a succession of falls or cascadesin a direction opposed to the current of gases active thereon; also, inthe combination of the mouth of the eduction-flue of the furnace, fromwhich the desulphurizing-gases issue, with the lower extremity of theinclined flue in such a manner as that the pulverized ore shall fall ina thin sheet or stream directly over the mouth of the eduction-flue,insuring thereby final direct contact of the inflamed gases with eachparticle of the ore.

Our apparatus consists mainly of a long shallow flue, A, built of brick,tile, or other suitable material, and having an inclination of about tendegrees, more or less. The propor tions of this flue may be about thatof three feet in width and six in depth; and it may be built upon theslope of a hill or embankment, or supported upon arches, trestle-work,or other suitable support. The length will vary with the class of oresto be treated-say from twenty to fifty feet. Its upper end opens into asuitable upright stack or chimney, B, ofsuch a height as will insure astrong draft through the flue A, and in the rear of the opening intothis chimney is placed a hopper or receiver, 0, into which thepulverized ores to be treated are fed.

The inclined flue A is made to terminate immediately over the mouth oropening of the flue D, supplying the active gases generated in thefurnace or firechamber E of the apparatus, and the end of the upperplate or top of the inclined flue A is so curved downward and inwardlyin front of said flue, as illustrated in Fig. 2, as to partially inclosealso the mouth of the eduction-flue D of the tire-chamber and conductthe ore falling from the inclined flue A over the same in to a suitablereceiving-chamber, G, constructed immediately beneath it.

A steam-pipe, S, pierced with small apertures, so as to allow the steamto escape therei from in line jets, is placed immediately below theeduction-tlue from the furnace, so as that the desulphurized ores may beexposed to the action of a current of steam at this point.

For greater compactness and convenience we construct the firechamber Eof theapparatus under the inclined flue A, in the rear of the lowerextremity thereof. This fire-chamber E is so arranged and constructed asto best obtain a decomposition of steam in contact with incandescentfuel therein, and the products of the combustion of the fuel and of thedecomposition of the steam are conducted to the inclined flue, asalready described.

Within the inclined flue A we place a series of conveying tables orshelves, K K K, so formed, as seen in Figs. 2 and 4, (or otherwisesupported upon theinclined plane of the flue,) as that when arranged inthe flue their upper surfaces shall be horizontal, or, at least, butslightly inclined. These conveying shelves or tables are left free toslide along the flue, but are connected together at suitable distancesby means of side rods, M M, Fig. 3, extending the entire length of theflue, and to which each table is pivoted, as seen Fig. 3. These rods M Mare united by a cross bar orhead at their upperend, and are made toslide back and forth slowly, and with a short movement in the flue, bymeans of the eccentric-connection of a link, Q, with a disk, N, upon arevolving shaft, P, outside of the apparatus, in the rear of thechimney.

The hop per is provided with a suitable checkgate, E, Fig. 2, toregulate the admission of the ore into the operating-flue A.

The operation of the apparatus is very sim ple. The shaft P, being putinto motion by any suitable power, imparts a short slidingback-and-forth movement to the tables K K of the flue A, so that thefinelypulverized ores fed into the upper end of said flue through thehopper 0 will be slowly conveyed forward and made to fall from shelf toshelf, from said upper and cooler end to the lower and hotter part ofthe inclined flue A until they reach its extremity and drop into thereceivin g-chamber G of the apparatus through the flame and gasesissuing from the furnace and the jets of steam escaping from the pipe S.a

The gases from the furnace, with the steam from pipe S, Fig. 2, passupward from the lower end of the inclined flue A through the same in adirection opposed to that of the current of the ore, Whose particles, asthey fall successively from shelf to shelf, are thus thoroughly exposedto the purifying, desulphurizing, and oxidizing power of said gases.

We comtemplate the employment of this apparatus, not only in thedesulphurization of ores, as described, but also in drying grain; & c.,under the influence of a current of heated air.

Having thus fully desoribed'our improved apparatus, what we claimtherein as new, and desire to secure by Letters Patent, is

1. The combination of a series of sliding tables or shelves, with theinterior of an inclined hot-air or gas-conducting flue, substantially inthe manner and for the purpose herein set forth.

2. In our improved apparatus, so combining the lower extremity of itsinclined flue with the ed notion-flue of the,furnace as that the ore orother material falling from the inclined plane shall drop in a thinsheet over the mouth of the said eduction-aperture, substantially in themanner and for the purpose herein set fortln F. W. CROSBY. WOODHULLHELM.

Witnesses as to. the signature of F. W. Crosby:

DAVID A. BURR, J. O. WINN.

Witnesses as to the signature of Woodhull Helm:

' 'l. HAMPDEN FIELD,

J. D. EARLE.

